Veysel Ayyildiz1, Yener Aydin2,3, Hayri Ogul3,4. 1. Department of Radiology, Suleyman Demirel University, Isparta, Turkey. 2. Department of Thoracic Surgery, Ataturk University, Erzurum, Turkey. 3. Department of Anesthesiology, Clinical Research Office, Ataturk University, Erzurum, Turkey. 4. Department of Radiology, Ataturk University, Erzurum, Turkey.